Battery pack shell structure

Abstract

The utility model discloses a battery pack shell structure which comprises a battery cell group, a battery box and a BMS (battery management system) board, the battery cell group is fixedly mounted in the battery box, the BMS board is electrically connected with the battery cell group, a vent hole group is arranged on one side wall of the battery box in a penetrating manner, and the BMS board is positioned in the battery box, is mounted on the side wall with the vent hole group in the battery box and is opposite to the position of the vent hole group. According to the battery box, the BMS plate can exchange heat with air outside the battery box through the vent hole group, so that the influence of heat dissipated in the charging and discharging process of the battery cell group on the working performance of the BMS plate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a battery pack shell structure. Background Art

[0002] Lithium-ion battery storage packs typically use a plastic casing to secure and protect the battery cells. The BMS is mounted inside the casing and connected to the battery's power supply cables. Because this closed-off structure prevents the heat generated by the battery during high-current operation from being quickly dissipated, reducing battery performance and safety.

[0003] In addition, most current lithium battery energy storage packs will enter a non-working state when the BMS triggers protection. Some batteries use Bluetooth or WIFI technology to check the real-time status of the battery, which results in high costs and is more cumbersome to check battery information. Utility Model Content

[0004] The purpose of the utility model is to provide a battery pack shell structure, and the technical problem to be solved is to reduce the influence of the heat emitted during the charging and discharging process of the battery pack on the working performance of the BMS board.

[0005] To achieve the above-mentioned purpose, the solution of the present invention is: a battery pack shell structure, including a cell group, a battery box and a BMS board, the cell group is installed and fixed in the battery box, the BMS board is electrically connected to the cell group, and a ventilation hole group is opened through one side wall of the battery box. The BMS board is located in the battery box and is installed on the side wall of the battery box with the ventilation hole group, and is opposite to the position of the ventilation hole group, so that the BMS board can exchange heat with the air outside the battery box through the ventilation hole group.

[0006] Furthermore, a flexible gasket is provided. The flexible gasket is arranged inside the battery box and around the periphery of the ventilation hole group. After the BMS board is installed, the flexible gasket is clamped between the BMS board and the side wall of the battery box to form a seal between the internal space of the battery box and the ventilation hole group.

[0007] Furthermore, the side wall on which the ventilation hole group is formed forms an annular groove in the battery box that extends around the ventilation hole group, and the flexible gasket is embedded in the annular groove.

[0008] Furthermore, the ventilation hole group is formed by a plurality of ventilation hole arrays.

[0009] Furthermore, each of the ventilation holes is located on a hole wall on the lower side, and gradually slopes downward from inside the battery box to outside the battery box.

[0010] Furthermore, the BMS board includes a BMS board body and a fixing plate. The fixing plate is made of metal. The BMS board body is fixed on the side of the fixing plate facing the battery box. The fixing plate is used to be installed and fixed on the side wall with the ventilation hole group in the battery box.

[0011] Furthermore, a control board is provided, which is electrically connected to the BMS board. The control board is also electrically connected to an indicator light, which is exposed outside the battery box.

[0012] Furthermore, the indicator light includes a plurality of power indicator lights, and the number of power indicator lights lit by the control board is positively correlated with the remaining power of the battery pack.

[0013] Furthermore, the indicator light includes a fault indicator light, which is used to light up when a battery pack fails.

[0014] Furthermore, the battery box is formed by an upper cover and a bottom shell that are fastened together and fixed.

[0015] Furthermore, two end plates are provided, and the two end plates are located at both ends of the battery cell group. An end plate fixing piece is fixed horizontally between the two end plates to fix the two end plates so that the battery cell group is clamped between the two end plates.

[0016] Furthermore, the side wall where the ventilation hole group is provided is protruded in the battery box to form a plurality of support columns, and the BMS board is mounted and fixed on each support column.

[0017] Furthermore, slots are longitudinally extended on the two opposite side walls inside the battery box, for the two ends of an insulating plate to slide longitudinally into, so that the insulating plate is fixed and isolated between the BMS board and the battery cell group.

[0018] After adopting the above solution, the beneficial effects of the utility model are:

[0019] (1) A ventilation hole group is formed on one side wall of the battery box, and the BMS board is installed on the side wall of the battery box with the ventilation hole group, and is directly opposite the location of the ventilation hole group, so that the BMS board can exchange heat with the air outside the battery box through the ventilation hole group, thereby reducing the influence of the heat emitted by the battery cell group during charging and discharging on the working performance of the BMS board;

[0020] (2) By setting a control board electrically connected to the BMS board, the control board is electrically connected to the indicator light, and the indicator light is exposed from the battery box, so that the working status of the battery pack can be displayed by the indicator light, which is convenient for users to observe at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is an exploded view of the utility model;

[0022] Figure 2 This is an exploded view of the BMS board of the present invention removed from the side wall of the battery box;

[0023] Figure 3 for Figure 2 A partial enlarged view of point A in the middle;

[0024] Figure 4 is a top view of the upper cover;

[0025] Figure 5 This is a partial exploded view of the present invention.

[0026] Explanation of the numbers: 1-battery cell group, 2-battery box, 3-BMS board, 4-side wall, 5-ventilation hole group, 6-flexible gasket, 7-ring groove, 8-ventilation hole, 9-hole wall, 10-BMS board body, 11-fixing plate, 12-control board, 13-battery indicator light, 14-upper cover, 15-bottom shell, 16-end plate, 17-end plate fixing, 18-support column, 19-bottom fixing, 20-battery cell insulation board, 21-fault indicator light, 22-data reading interface, 23-slot, 24-insulation board. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] The following will fully describe the embodiments of the present invention with reference to the accompanying drawings. It should be noted that the present invention can be implemented in different forms and is not limited to the embodiments illustrated herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present invention to those skilled in the art.

[0029] The utility model provides a battery pack shell structure, such as Figure 1-5 As shown, it includes a cell group 1, a battery box 2 and a BMS board 3. The cell group 1 can be composed of one or more batteries that can be charged and discharged. In this embodiment, lithium batteries are preferably used. The shape of the battery box 2 is not limited. The preferred embodiment is given later. The cell group 1 is installed and fixed in the battery box 2. The BMS board 3 is electrically connected to the cell group 1 to manage and control the charging and discharging process of the cell group 1 in the battery box 2 (this is a common technical means in this field and will not be described in detail in this embodiment). A ventilation hole group 5 is opened on one side wall 4 of the battery box 2. The ventilation hole group 5 consists of multiple ventilation holes. The BMS board 3 is located in the battery box 2 and is installed on the side wall 4 of the battery box 2 having the ventilation hole group 5, and is opposite to the location of the ventilation hole group 5. Furthermore, through the above scheme, the BMS board 3 can exchange heat with the air outside the battery box 2 through the ventilation hole group 5, thereby reducing the influence of the heat emitted during the charging and discharging process of the battery cell group 1 on the working performance of the BMS board 3. Preferably, slots 23 are longitudinally extended on the opposite side walls inside the battery box 2, respectively, for the two ends of an insulating plate 24 to slide longitudinally into, so that the insulating plate 24 is fixedly isolated between the BMS board 3 and the battery cell group 1 to play the role of insulation and heat insulation.

[0030] In order to ensure the sealing of the battery box 2 while ventilating and prevent external dust and moisture from entering the battery box 2 through the ventilation hole group 5, in a preferred embodiment, the BMS board 3 includes a BMS board body 10 and a fixing plate 11. The fixing plate 11 is made of metal, preferably aluminum alloy. The BMS board body 10 is fixed on the side of the fixing plate 11 facing the inside of the battery box 2. The heat emitted by the BMS board body 10 is conducted to the fixing plate 11. The fixing plate 11 is used to support and protect the BMS board body 10. The fixing plate 11 is installed and fixed in the battery box 2 with a ventilation hole group. 5, and then the heat on the fixing plate 11 will be heat exchanged with the outside cold air through the ventilation hole group 5. A flexible gasket 6 is also provided in the battery box 2. The flexible gasket 6 is in a square shape and is arranged around the periphery of the ventilation hole group 5 in the battery box 2. After the BMS board 3 is installed, the flexible gasket 6 is clamped between the fixing plate 11 of the BMS board 3 and the side wall 4 of the battery box 2 to form a seal between the internal space of the battery box 2 and the ventilation hole group 5, thereby preventing dust and water vapor outside the battery box 2 from entering the battery box 2 through the ventilation hole group 5, thereby ensuring reliability during use;

[0031] More preferably, in order to prevent the flexible gasket 6 from shifting after long-term use, which would result in a reduction in the sealing effect, the side wall 4 having the ventilation hole group 5 is provided with a ring groove 7 extending around the ventilation hole group 5 in the battery box 2, and the flexible gasket 6 is embedded in the ring groove 7 to fix the position of the flexible gasket 6. More preferably, the flexible gasket 6 is adhered to the ring groove 7 by adhesive.

[0032] Specifically, a plurality of support columns 18 are formed on the side wall 4 where the ventilation hole group 5 is provided, and protrudes from the battery box 2 . The BMS board 3 is fixed to each support column 18 by screws.

[0033] To avoid the accumulation of dust and water droplets, in a preferred embodiment, each of the ventilation holes 8 is located on the lower hole wall 9, which gradually tilts downward from the inside of the battery box 2 to the outside of the battery box 2, so that dust and water droplets can be discharged outward along the tilted hole wall 9.

[0034] In order to facilitate the user to observe the working status of the battery pack 1 at any time, a control board 12 is also provided. The control board 12 is electrically connected to the BMS board 3 and is used to read the monitoring information of the battery pack 1 by the BMS board 3 (conventional technical means in this field). The control board 12 is also electrically connected to an indicator light 13, and the indicator light 13 is exposed outside the battery box 2. Specifically, in this embodiment, each indicator light 13 is exposed on the top surface of the battery box 2, so that the working status of the battery pack 1 is displayed by the indicator light 13. The working status may include power information, fault information, etc., which can be easily displayed by conventional technical means of those skilled in the art. It can be achieved, so it is not described in detail in this embodiment; preferably, the indicator light 13 includes a plurality of power indicator lights 13, and the number of power indicator lights 13 lit by the control board 12 is positively correlated with the remaining power of the battery cell group 1, and the indicator light 13 also includes a plurality of fault indicator lights 21. When a corresponding fault occurs in the battery cell group 1, the corresponding fault indicator light 21 is lit; more preferably, the control board 12 is also electrically connected to a data reading interface 22, and the data reading interface 22 is also exposed to the battery box 2, so that the staff can read the monitoring information of the battery cell group 1 by the BMS board 3 from the data reading interface 22.

[0035] In order to simplify the structure, the battery box 2 includes an upper cover 14 and a bottom shell 15. The upper cover 14 is in the shape of a square groove with an opening on the bottom surface, and the bottom shell 15 is in the shape of a square groove with an opening on the top surface. The contours of the grooves of the two correspond to each other. The upper cover 14 and the bottom shell 15 are fastened together and fixed to form the battery box 2. The ventilation hole group 5 is formed on the bottom shell 15. The structure is simple and easy to disassemble and assemble. Specifically in this embodiment, the slot 23 is formed on the bottom shell 15.

[0036] In order to prevent the battery cell group 1 from being deformed after long-term use, two end plates 16 are further provided. The two end plates 16 are located at both ends of the battery cell group 1. An end plate fixing piece 17 is fixed horizontally between the two end plates 16 to fix the two end plates 16 so that the battery cell group 1 is clamped between the two end plates 16.

[0037] More specifically, a bottom fixing part 19 is fixed to the bottom surface of the battery cell group 1, and the bottom fixing part 19 is fixed to the bottom surface of the battery box 2. Electrode contacts are set on the top surface of the battery cell group 1. A battery cell insulation plate 20 is set on the top surface of the battery cell group 1 for insulation, and the control board 12 is set above the battery cell insulation plate 20.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. Any equivalent changes made based on the key design of this case shall fall within the scope of protection of this case.

Claims

1. A battery pack housing structure, characterized in that: The battery pack (1) comprises a battery cell group (1), a battery box (2) and a BMS board (3). The battery cell group (1) is fixedly installed in the battery box (2). The BMS board (3) is electrically connected to the battery cell group (1). A ventilation hole group (5) is provided through a side wall (4) of the battery box (2). The BMS board (3) is located in the battery box (2) and is installed on the side wall (4) of the battery box (2) having the ventilation hole group (5) and facing the location of the ventilation hole group (5).

2. The battery pack housing structure according to claim 1, wherein: A flexible gasket (6) is also provided. The flexible gasket (6) is arranged inside the battery box (2) around the periphery of the ventilation hole group (5). After the BMS board (3) is installed, the flexible gasket (6) is clamped between the BMS board (3) and the side wall (4) of the battery box (2) to form a seal between the internal space of the battery box (2) and the ventilation hole group (5).

3. The battery pack housing structure according to claim 2, wherein: The side wall (4) on which the ventilation hole group (5) is formed forms an annular groove (7) extending around the ventilation hole group (5) in the battery box (2), and the flexible gasket (6) is embedded in the annular groove (7).

4. The battery pack housing structure according to claim 1, wherein: The ventilation hole group (5) is formed by an array of multiple ventilation holes (8).

5. The battery pack housing structure according to claim 4, wherein: Each of the ventilation holes (8) is located on the lower hole wall (9), and gradually slopes downward from the inside of the battery box (2) to the outside of the battery box (2).

6. The battery pack housing structure according to claim 1, wherein: The BMS board (3) includes a BMS board body (10) and a fixing plate (11). The fixing plate (11) is made of metal. The BMS board body (10) is fixed to a side of the fixing plate (11) facing the inside of the battery box (2). The fixing plate (11) is used to be installed and fixed on a side wall (4) having a ventilation hole group (5) in the battery box (2).

7. The battery pack housing structure according to claim 1, wherein: A control panel (12) is also provided, and the control panel (12) is electrically connected to the BMS panel (3). The control panel (12) is also electrically connected to an indicator light (13), and the indicator light (13) is exposed outside the battery box (2).

8. The battery pack housing structure according to claim 7, wherein: The indicator lights (13) include a plurality of power indicator lights (13), and the number of power indicator lights (13) lit by the control board (12) is positively correlated with the remaining power of the battery pack (1).

9. The battery pack housing structure according to claim 7, wherein: The indicator light (13) includes a fault indicator light (21) for lighting up when the battery pack (1) fails.

10. The battery pack housing structure according to claim 1, wherein: Slots (23) are longitudinally extended on opposite side walls inside the battery box (2) for the two ends of an insulating plate (24) to slide longitudinally into, so that the insulating plate (24) is fixedly isolated between the BMS board (3) and the battery cell group (1).

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